Depending on just how crazy Waze wanted to get with moods, the ability to have a sporty moods... adding in all college or pro teams would be way too many options (unless mood selection was made more complex than it is now). Maybe just using a sport gear items though... football, soccer ball.. baseball, tennis, volleyball, golf, fishing pole, etc. For more of a team builder, maybe just the option to have a pennant style flag with some basic color options.